| temperature sex-reversal in amphibians and reptiles. | the sexual differentiation of gonads has been shown to be temperature-sensitive in many species of amphibians and reptiles. in two close species of salamanders, pleurodeles poireti and p. waltl, both displaying a zz/zw mechanism of genotypic sex determination (gsd), the rearing of larvae at high temperatures (30 degrees-32 degrees c) produces opposite effects: zz genotypic males of pleurodeles poireti become phenotypic females whereas zw genotypic females of p. waltl become phenotypic males. sex ... | 1990 | 2393628 |
| comparative larval morphology in three species of <i>pleurodeles</i> (urodela: salamandridae). | the ribbed newts (genus pleurodeles) are endemic to the iberian peninsula and northwest africa (raffaëlli 2013), and comprise three species: pleurodeles nebulosus (guichenot 1850), pleurodeles poireti (gervais 1836) and pleurodeles waltl michahelles 1830. pleurodeles nebulosus is found in northern algeria and tunisia with an average size of 18 cm, while p. poireti is endemic to the edough massif, in northeastern algeria and is the smallest species, with 12.9 cm in total length (escoriza et al. 2 ... | 2017 | 28264286 |
| isolation and structure of a novel pyridine derivative from the algerian newt, pleurodeles waltlii. | since its discovery more than 20 years ago the structure of a strongly fluorescent compound called "pleurodeles blue" has remained unknown. isolation of this pigment has been carried out by successive column chromatographies including epichlorohydrin-triethanolamine-sephadex and phospho-sephadex. the structural elucidation of a novel pyridone n-glycoside, 1-beta-d-glucopyranosylpyrid-2(1h)-one-6-acetic acid, is based on a detailed study of its high-resolution mass spectra, 1h and 13c-nmr spectra ... | 1988 | 3402449 |
| in vivo effects of gamma-irradiation on the functional architecture of the lampbrush chromosomes in pleurodeles (amphibia, urodela). | in vivo irradiation of ovaries of pleurodeles poireti by gamma-rays leads to structural rearrangement of lampbrush chromosomes in late vitellogenic oocytes (stages v and vi). the loops collapse into the chromomeres and the axes condense. doses between 200 and 2,000 rads have been tested. we observed that such changes were dependent on the irradiation dose though the chronological order of the events was irrespective of the dose. the maximum effect was attained about 10 h after irradiation. the a ... | 1979 | 510074 |
| experimental gynogenesis in the newt species pleurodeles waltlii and p. poireti. | eggs of diploid females of pleurodeles waltlii, inseminated by genetically inactivated sperm of salamandra salamandra, have been treated by heat-shock or increased hydrostatic pressure during the first hour of their development. the resulting viable gynogenetic individuals show different degrees of ploidy although they mostly are diploid. the use of females with a pericentric inversion as a marker chromosome allow the chromosomal constitution to be clarified. eggs of females heterozygous for a r ... | 1978 | 738163 |
| [demonstration of q bands on mitotic chromosomes of the amphibian urodele pleurodeles poireti gervais, after staining with quinacrine mustard. comparison with pleurodeles waltii]. | preparations of metaphase chromosomes of the amphibian urodele pleurodeles poireti were obtained by squashing cells from tailbuds of ten days old embryos which had been in 50% acetic acid. the q-bands karyotype is described. frequently the induced secondary constrictions exhibit a bright fluorescence, as do the centromeres, except for that of chromosome xii. in contrast, satellites on chromosomes iii, iv, and xi exhibit little fluorescence. this pattern is compared with that in pleurodeles waltl ... | 1977 | 76459 |
| [a lethal factor causing balanced agenesis in the urodele amphibian, pleurodeles poireti gervais]. | | 1972 | 4631651 |
| [demonstration on lampbrush chromosomes of pleurodeles poireti gervais, urodele amphibia, of a structure linked with sex, identifying the sexual bivalent and labelling the chromosome w]. | | 1970 | 4988325 |
| [study of lactate dehydrogenase in hybrids obtained by experimental crosses between 2 species of urodele amphibia: pleurodeles waltlii michah and pleurodeles poireti gervais]. | | 1970 | 4988157 |
| [comparative analysis of the serum proteins in 2 species of the genus pleurodeles (urodele amphibia): pleurodeles waltlii and pleurodeles poireti]. | | 1966 | 4963942 |
| [the karyotype of the urodele pleurodeles poireti gervais. comparative study of karyotypes in the genus pleurodeles]. | | 1966 | 4955664 |